Thanks for writing to us.
The traces of blood in the semen could be due to an infection in the prostate
. Such an infection is not likely to be transmitted from the tooth. Taking a course of antibiotic has fortunately taken care of both the infections. Since you have not seen any traces of blood now so there is nothing more to worry.
I hope this information has been both informative and helpful for you.
Dr. Praveen Tayal